Yeah I do think there is something cool about keeping it in the family in that regard, My nova I considered a YB for a while but went Saab for several reasons but one of them was that its all from the same family at the time (as GM owned saab back then)

Its also been done before with the renault engine, so I know that it will physically fit in the bay.

This actual car had a renault turbo in it apreviously although they did it differently and built a megane lump into the williams block and used the williams gearbox and shafts etc, which I dont really want to do cause of the box.
good thing is that its still got the pedal box in it that solves the clearance issues around the turbo on the megane lump as well, so i'd only need to use a remote cable operated master cylinder for the clutch and it would go in relatively easily in terms of the pedals.